Hi,Low back pain
and farting can both be due to the same cause, that is, gaseous distension of the abdomen. Nonvegetarian diet causes more acidity and gas formation and so, worsens your back pain and farting. Taking medications to reduce acid production will help. Quitting tobacco and taking regular exercise will also make a remarkable difference. I do not feel there is a serious anomaly in the colon
. But if you wish, you can get a MRI
scan done. If you are finding it difficult to quit tobacco, ask your doctor regarding medicines like bupropion
to reduce your craving and help you quit.